Wait until Crunch starts chasing you, and watch out for the fireballs (some will split in two). Keep running and dodging the fireballs until you reach a robot suit. Crash will automatically jump in. Then you'll start chasing HIM. To get to him faster, keep jumping while moving and firing water with R1 at the same time. The chases will get longer than the previous ones. Once you've defeated Crunch, run back to the start and collect the "Tornado" pick-up. This will automatically equip Crash with the "Tornado" attack move. Hope it's helpful!